Photoluminescence characterization and energy transfer of NaBa_1?x?yPO₄:xCe³⁺, yTb³⁺ phosphors

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• 作者：Xihua DOU ; Weiren ZHAO ; Enhai SONG ; Linlin DENG ; Xiabing FANG ; Huachu MIN
• 关键词：optical materials ; crystal structure ; luminescence ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2012
• 出版时间：August, 2012
• 年：2012
• 卷：30
• 期：8
• 页码：739-743
• 全文大小：679 K

文摘

A series of NaBa_1?x?yPO₄:xCe³⁺, yTb³⁺ phosphors were synthesized by solid-state reaction method. The crystal structure, photoluminescence emission and excitation spectra and decay times of the phosphors were carefully investigated. The results revealed that an efficient energy transfer occurred from Ce³⁺ to Tb³⁺ ions in NaBaPO₄ host by means of dipole-dipole interactions and the critical distance of the energy transfer was about 0.638 nm. Moreover, the phosphor emitted strong green emission under UV excitation, indicating that the phosphors are potentially useful as a highly efficient, green-emitting phosphor.